One of the reasons why I think the next ME game will not be about the Ryders is because Ryder is a Pathfinder and why open up the Heleus cluster as our new surroundings to leave it again?
The Kett arc if there will be on will be more of a military mission than a discovery mission. The only way that Ryder, in my view, could be a logical continuation is if she/he stops being a Pathfinder, in which case it'd have to be a pretty clear reason after the heroics in the heleus cluster.
So not saying it's impossible but I just wonder how it makes sense to still be pathfinding in part 2 in the same Heleus cluster. Fighting over more planets in a different area with the Kett again as part of getting closer to the Kett Empire seems a bit thin as well and would have a rather been-there, done-that feel.